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ao not nave a quicK ana sate way to store or aispose OT tnem. A! my aistnci, we nave nazmat PICKUP once per year. Perhaps if my lab were completely cleaned out, this would not pose a problem, but as continue to cull old chemicals, I continue to find dangerous ones. I recommend contacting your district officials to determine the date of the next scheduled hazmat pickup, or if they would prefer to have hazardous materiais brought to a central location. If that is not an option,you should contact a nearby college or university. They tend to have more frequent pickup schedules and are typically happy to help local schools. According to the Local Hazardous Waste Management Program (LHWMP) in King County, Washington,the three most common school lab hazardous wastes are heavy metal solutions (including chromium, copper, lead, etc.), organic solvents (hexane, benzene,toluene, etc.), and corrosive liquids (strong acids or bases). The LHWMIP website includes these guidelines: 1. Heavy metal solutions should be collected "in a single large wide-mouthed container lined with a sliding lock plastic bag. Leave the bag open so most of the water can be evaporated in a fume hood. When the bag is full of settled solids, zip it closed and piace it in a five-gallon bucket labeled `Hazardous Waste — Heavy Metais' and snap the lid closed. When this five-gallon bucket is full of bags of sludge, dispose of it as hazardous waste." 2. Organic solvents should be collected in a container with a tight-fitting lid and labeled as hazardous waste. 3. Corrosive liquids, such as strong acids and bases, should be disposed of as hazardous waste. However, if appropriately diluted to a pH between 5.5 and 10.5,these can go down the drain. You should keep a log of hazardous materials and waste to avoid extra costs associated with hazmat pickup. If technicians know exactly what is in your hazardous waste,they will not have to perform additional identification testing that will cost you money. What to purchase to update storage Be certain your lab has dedicated cabinets for flammables and corrosives. If not, this is an important purchase. Along with your chemicals, be sure to order new bottles for lab use. Keep or purchase extra glass bottles with tight-fitting lids for solvent disposal. Something that is often forgotten is labels; purchase new labels to keep careful record of your chemicals and their wastes. Helpful tips Contact a local college or university for assistance and possible hazmat pickup. After the AP exam, your AP students could find and look over the SDS for pertinent information. 0 Do one shelf at a time.